body {
  background-color: #fff;
}
.div {
  width: 100px;
  height: 100px;
  font-size: 10px;
  color: green;
  border: 1px solid red;
}
.div1 {
  width: 100px;
  height: 100px;
  font-size: 10px;
  color: green;
  border: 1px solid red;
}
.p {
  font-size: 15px;
  color: #000;
}
h2 {
  border: 1px solid #000000;
}
h1:hover {
  border: 1px solid red;
}
button:hover {
  border: 1px solid red;
}
